Key-fastener



(No Model.)

0. O. HARLOW.

KEY FASTENER.

Patented Nov. 20, 1888.

nliltilll WITNESSES .Z'dwdnfi yea/6 UNITED STATES PATENT D aries,

GUSHING G. HARLOWV, OF BROOKTON, ASSIGNOR, BY MESNE ASSIGNMENTS, TOEDWIN G. GARLETON, OF CHELSEA, MASSACHUSETTS.

KEY- FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 393,302, dated November20, 1888.

Application filed February 14, 1888. Serial No. 264,012.

T0 at whom it may concern:

Be it known that I, GUsHINe O. HARLOW, a citizen of the UnitedStates,residing at Brockton, in the county of Plymouth and State ofMassachusetts, have invented certain new and useful ImprovementsinKey-Fasteners; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to key-fasteners; and its object is to provide animproved device of this class possessing merit in point of simplieity,durability, inexpensiveness, and general eiiiciency.

In the drawings, Figure 1 is a perspective view showing my inventionapplied to adoor. Fig. 2 is a longitudinal sectional view. Fig. 3 is atransverse sectional view.

Corresponding parts in the fi gu res are denoted by the same letters ofreference.

Referring to the drawings, A designates a plate, preferably circular inshape and provided with two or more perforations, a, for the receptionof screws or fastening devices to secure it to the door. Upon the faceof this plate is provided a forwardly-projecting centrally-arranged arm,B, slotted longitudinally and centrally, as shown at I).

VVit-hin the slot I) is pivoted the end of a chain, 0, preferablyconstructed of fiat Inetallie plates 0, every other link of said chainbeing a single plate, while the intermediate links are composed of twoplates pivoted at their corresponding ends, one at each side, to theadjoining end of the single-plate link. It will be observed that thelink pivoted in the slotted arm is of a single plate, while the link atthe other end of the chain is of the doubleplate construction abovedescribed.

(No model.)

At the outer end of the chain, between the plates forming the link, arepivoted the ends (I d of two flat spring-arms, D D, which to gether areof an approximately V shape. Near the outer ends of these spring-armsthey are bent inwardly at an angle to the main por tion, as shown at d,thence on a line with said main portion, as shown at d'fland the extremeends are bent or turned outwardly at an angle (see d) to the portion (1thereby forming an approximately rectangular recess, I), for the purposehereinafter set forth.

The operation and advantages of my invention will be readily understoodby those skilled in the art to which it appertains. The plate is securedto the door in such a manner as to allow vertical movement or adjustmentof the chain and spring,and at a point below the key equal to the lengthof the device.

To secure the key in the lock, the eye at the outer end is turned to ahorizontal position and the ends of the spring-arm inserted therein, thesides of said eye engaging the recesses at the outer ends of thespring-arms.

I claim as my invention-- The combination, with the plate A, having aslotted arm, B, of the flat link-chain C, having two plates on its outerend,and the springarms secured between said end plates and divergingoutwardly in opposite directions, their upper ends being bent to formrecesses, as D, for the reception of the key, substantially asdescribed. 1

In testimony whereof I affix my signature in presence of two witnesses.

OUSHING o. HARLOW.

IVitnesses:

CHAS. W. SUMNER, ARTHUR J. VVALLEN.

